Piston ring sets

KS Kolbenschmidt piston ring sets are an important component for reconditioning engines. For intermediate reconditioning of engines with liners we recommend to check further usability of the pistons and to replace the piston rings and cylinder liners. This ensures run-in of the piston rings with the sliding surface of the cylinder liner.

In general, a distinction is made between compression rings, scraper rings and oil control rings. They all have the primary task to seal off combustion chamber and crankcase against each other. The compression rings are to prevent combustion gases from getting into the crankcase from the combustion chamber. Scraper rings combine the function of the compression rings and the oil control rings; so in essence they keep combustion gases away from the crankcase and wipe off excess oil on the cylinder wall.

The task of the oil control rings is to scrape off the excess oil from the cylinder wall  to limit and to limit entry of the lubricating oil into the
combustion chamber as much as possible. The aim is to achieve low oil consumption  an sufficient lubrication of moving parts and at the same time entry of gas as little as possible.

Another important task of the rings is the conduction of a proportion of the piston heat to the cooled cylinder wall. The first ring is responsible for the main proportion, the following rings take a smaller proportion. Inertial and gas forces as well as high temperatures
make high technical demands on the piston rings. An optimum service life
and compliance with exhaust gas legislation can only be achieved through
accurate adaptation to the respective engine.

Surface coatings

Chromium-plated piston ring sliding surfaces reduce the wear of the interacting sliding parts and increase durability.

Molybdenum-coated rings offer maximum temperature resistance and very good emergency running properties.

Piston rings with chrome ceramic coatings reduce cylinder wear and ensure maximum durability.

Spherically lapped piston ring sliding surfaces shorten the run-in time and ensure the best sliding properties right from the start.

Keystone-shaped compression rings prevent ring sticking in the grooves and
ensure trouble-free operation.

Each type of piston ring can be specialised for different applications by varied shaping of the front and back of the ring.

AbbreviationName
CK

Chromium-ceramics

CRSliding surface chrome-plated
FXSliding surface ferrox-filled
MOSliding surface molybdenum-coated
NTSliding surface nitrided
PCSliding surface plasma-coated

Materials

Class acc. to
ISO 6621-3
Average
E-M (N/mm²)
Break resistant
E-M (N/mm²)
Hardness
12100 000350

95HRB

22115 000450106 HRB
23115 000450400 HV5
24115 000500108 HRB
53160 0001 30095 HRB
55160 0001 30095 HRB
61200 000-33-44 HRC
Use of cookies and data protection

Motorservice Group uses cookies saved to your device in order to optimize and continuously improve its websites, as well as for statistical purposes. Further information on our use of cookies can be found here, together with our publication details and data protection notice.

By clicking on “OK” you confirm that you have taken note of the information on cookies, the data protection declaration and the publication details. You can also change your cookie settings for this website at any time.

Privacy settings

We place great importance on transparent information relating to all aspects of data protection. Our website contains detailed information on the settings you can select and what effect these settings have. You can change your selected settings at any time. Regardless of the selection you choose, we will not draw any conclusions regarding you as a person (except where you have explicitly entered your details). For information on deleting the cookies, please see the help function in your browser. You can find out more in the data protection declaration.

Change your privacy settings by clicking on the corresponding buttons

Necessary

Cookies essential for the system ensure that the website works correctly. Without these cookies, malfunctions or error messages may occur.

This website will:

  • Store cookies required by the system
  • Store the settings you make on this website

This site wil never do the following without your agreement:

  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Convenience

These cookies make the website easier to use and save settings, for example, so that you do not have to repeat them every time you visit the site.

This website will:

  • Store cookies required by the system
  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.

This site wil never do the following without your agreement:

  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Statistics

Statistics cookies enable us to evaluate the usage behaviour on the website anonymously – without enabling any conclusions to be drawn about you as a person. This enables us to measure the performance of the website and to improve it continuously to offer a better user experience.

This website will:

  • Store cookies required by the system
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.

This site wil never do the following without your agreement:

  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Of course, we will always respect the do-not-track (DNT) setting in your browser. In this case, no tracking cookies are set and no tracking functions are loaded.